Sono disponibili altri esempi AWS SDK nel repository [AWS Doc SDK](https://github.com/awsdocs/aws-doc-sdk-examples) Examples. GitHub
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# Esempi per Amazon RDS con SDK per Python (Boto3)
I seguenti esempi di codice mostrano come eseguire azioni e implementare scenari comuni utilizzando Amazon RDS. AWS SDK per Python (Boto3)
*Nozioni di base*: esempi di codice che mostrano come eseguire le operazioni essenziali all’interno di un servizio.
Le *azioni* sono estratti di codice da programmi più grandi e devono essere eseguite nel contesto. Sebbene le azioni mostrino come richiamare le singole funzioni del servizio, è possibile visualizzarle contestualizzate negli scenari correlati.
*Scenari*: esempi di codice che mostrano come eseguire un’attività specifica chiamando più funzioni all’interno dello stesso servizio o combinate con altri Servizi AWS.
Ogni esempio include un link al codice sorgente completo, in cui vengono fornite le istruzioni su come configurare ed eseguire il codice nel contesto.
**Topics**
+ [Nozioni di base](#get_started)
+ [Nozioni di base](#basics)
+ [Azioni](#actions)
+ [Scenari](#scenarios)
+ [Esempi serverless](#serverless_examples)
## Nozioni di base
### Hello Amazon RDS
Il seguente esempio di codice mostra come iniziare a usare Amazon RDS.
**SDK per Python (Boto3)**
C'è altro su. GitHub Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
"""
Purpose
Shows how to use the AWS SDK for Python (Boto3) with the Amazon Relational Database Service
(Amazon RDS) to list the databases in your account.
"""
import boto3
from botocore.exceptions import ClientError
# Create an RDS client
rds_client = boto3.client("rds")
# Create a paginator for the describe_db_instances operation
paginator = rds_client.get_paginator("describe_db_instances")
try:
# Use the paginator to get a list of DB instances
response_iterator = paginator.paginate(
PaginationConfig={
"MaxItems": 123,
"PageSize": 50, # Adjust PageSize as needed
"StartingToken": None,
}
)
# Iterate through the pages of the response
instances_found = False
for page in response_iterator:
if "DBInstances" in page and page["DBInstances"]:
instances_found = True
print("Your RDS instances are:")
for db in page["DBInstances"]:
print(db["DBInstanceIdentifier"])
if not instances_found:
print("No RDS instances found!")
except ClientError as e:
print(f"Couldn't list RDS instances. Here's why: {e.response['Error']['Message']}")
```
+ Per i dettagli sull'API, consulta [Descrivi DBInstances](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBInstances) in *AWS SDK for Python (Boto3) API Reference*.
## Nozioni di base
### Informazioni di base
L’esempio di codice seguente mostra come:
+ Creare un gruppo di parametri database personalizzati e imposta i relativi valori.
+ Creare un’istanza database configurata per utilizzare il gruppo di parametri. L’istanza DB contiene anche un database.
+ Acquisire uno snapshot dell’istanza.
+ Eliminare l’istanza e il gruppo di parametri.
**SDK per Python (Boto3)**
C'è di più su. GitHub Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
Esegui uno scenario interattivo al prompt dei comandi.
```
class RdsInstanceScenario:
"""Runs a scenario that shows how to get started using Amazon RDS DB instances."""
def __init__(self, instance_wrapper):
"""
:param instance_wrapper: An object that wraps Amazon RDS DB instance actions.
"""
self.instance_wrapper = instance_wrapper
def create_parameter_group(self, parameter_group_name, db_engine):
"""
Shows how to get available engine versions for a specified database engine and
create a DB parameter group that is compatible with a selected engine family.
:param parameter_group_name: The name given to the newly created parameter group.
:param db_engine: The database engine to use as a basis.
:return: The newly created parameter group.
"""
print(
f"Checking for an existing DB instance parameter group named {parameter_group_name}."
)
parameter_group = self.instance_wrapper.get_parameter_group(
parameter_group_name
)
if parameter_group is None:
print(f"Getting available database engine versions for {db_engine}.")
engine_versions = self.instance_wrapper.get_engine_versions(db_engine)
families = list({ver["DBParameterGroupFamily"] for ver in engine_versions})
family_index = q.choose("Which family do you want to use? ", families)
print(f"Creating a parameter group.")
self.instance_wrapper.create_parameter_group(
parameter_group_name, families[family_index], "Example parameter group."
)
parameter_group = self.instance_wrapper.get_parameter_group(
parameter_group_name
)
print(f"Parameter group {parameter_group['DBParameterGroupName']}:")
pp(parameter_group)
print("-" * 88)
return parameter_group
def update_parameters(self, parameter_group_name):
"""
Shows how to get the parameters contained in a custom parameter group and
update some of the parameter values in the group.
:param parameter_group_name: The name of the parameter group to query and modify.
"""
print("Let's set some parameter values in your parameter group.")
auto_inc_parameters = self.instance_wrapper.get_parameters(
parameter_group_name, name_prefix="auto_increment"
)
update_params = []
for auto_inc in auto_inc_parameters:
if auto_inc["IsModifiable"] and auto_inc["DataType"] == "integer":
print(f"The {auto_inc['ParameterName']} parameter is described as:")
print(f"\t{auto_inc['Description']}")
param_range = auto_inc["AllowedValues"].split("-")
auto_inc["ParameterValue"] = str(
q.ask(
f"Enter a value between {param_range[0]} and {param_range[1]}: ",
q.is_int,
q.in_range(int(param_range[0]), int(param_range[1])),
)
)
update_params.append(auto_inc)
self.instance_wrapper.update_parameters(parameter_group_name, update_params)
print(
"You can get a list of parameters you've set by specifying a source of 'user'."
)
user_parameters = self.instance_wrapper.get_parameters(
parameter_group_name, source="user"
)
pp(user_parameters)
print("-" * 88)
def create_instance(self, instance_name, db_name, db_engine, parameter_group):
"""
Shows how to create a DB instance that contains a database of a specified
type and is configured to use a custom DB parameter group.
:param instance_name: The name given to the newly created DB instance.
:param db_name: The name given to the created database.
:param db_engine: The engine of the created database.
:param parameter_group: The parameter group that is associated with the DB instance.
:return: The newly created DB instance.
"""
print("Checking for an existing DB instance.")
db_inst = self.instance_wrapper.get_db_instance(instance_name)
if db_inst is None:
print("Let's create a DB instance.")
admin_username = q.ask(
"Enter an administrator user name for the database: ", q.non_empty
)
admin_password = q.ask(
"Enter a password for the administrator (at least 8 characters): ",
q.non_empty,
)
engine_versions = self.instance_wrapper.get_engine_versions(
db_engine, parameter_group["DBParameterGroupFamily"]
)
engine_choices = [ver["EngineVersion"] for ver in engine_versions]
print("The available engines for your parameter group are:")
engine_index = q.choose("Which engine do you want to use? ", engine_choices)
engine_selection = engine_versions[engine_index]
print(
"The available micro DB instance classes for your database engine are:"
)
inst_opts = self.instance_wrapper.get_orderable_instances(
engine_selection["Engine"], engine_selection["EngineVersion"]
)
inst_choices = list(
{
opt["DBInstanceClass"]
for opt in inst_opts
if "micro" in opt["DBInstanceClass"]
}
)
inst_index = q.choose(
"Which micro DB instance class do you want to use? ", inst_choices
)
group_name = parameter_group["DBParameterGroupName"]
storage_type = "standard"
allocated_storage = 5
print(
f"Creating a DB instance named {instance_name} and database {db_name}.\n"
f"The DB instance is configured to use your custom parameter group {group_name},\n"
f"selected engine {engine_selection['EngineVersion']},\n"
f"selected DB instance class {inst_choices[inst_index]},"
f"and {allocated_storage} GiB of {storage_type} storage.\n"
f"This typically takes several minutes."
)
db_inst = self.instance_wrapper.create_db_instance(
db_name,
instance_name,
group_name,
engine_selection["Engine"],
engine_selection["EngineVersion"],
inst_choices[inst_index],
storage_type,
allocated_storage,
admin_username,
admin_password,
)
while db_inst.get("DBInstanceStatus") != "available":
wait(10)
db_inst = self.instance_wrapper.get_db_instance(instance_name)
print("Instance data:")
pp(db_inst)
print("-" * 88)
return db_inst
@staticmethod
def display_connection(db_inst):
"""
Displays connection information about a DB instance and tips on how to
connect to it.
:param db_inst: The DB instance to display.
"""
print(
"You can now connect to your database using your favorite MySql client.\n"
"One way to connect is by using the 'mysql' shell on an Amazon EC2 instance\n"
"that is running in the same VPC as your DB instance. Pass the endpoint,\n"
"port, and administrator user name to 'mysql' and enter your password\n"
"when prompted:\n"
)
print(
f"\n\tmysql -h {db_inst['Endpoint']['Address']} -P {db_inst['Endpoint']['Port']} "
f"-u {db_inst['MasterUsername']} -p\n"
)
print(
"For more information, see the User Guide for Amazon RDS:\n"
"\thttps://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_GettingStarted.CreatingConnecting.MySQL.html#CHAP_GettingStarted.Connecting.MySQL"
)
print("-" * 88)
def create_snapshot(self, instance_name):
"""
Shows how to create a DB instance snapshot and wait until it's available.
:param instance_name: The name of a DB instance to snapshot.
"""
if q.ask(
"Do you want to create a snapshot of your DB instance (y/n)? ", q.is_yesno
):
snapshot_id = f"{instance_name}-{uuid.uuid4()}"
print(
f"Creating a snapshot named {snapshot_id}. This typically takes a few minutes."
)
snapshot = self.instance_wrapper.create_snapshot(snapshot_id, instance_name)
while snapshot.get("Status") != "available":
wait(10)
snapshot = self.instance_wrapper.get_snapshot(snapshot_id)
pp(snapshot)
print("-" * 88)
def cleanup(self, db_inst, parameter_group_name):
"""
Shows how to clean up a DB instance and parameter group.
Before the parameter group can be deleted, all associated DB instances must first
be deleted.
:param db_inst: The DB instance to delete.
:param parameter_group_name: The DB parameter group to delete.
"""
if q.ask(
"\nDo you want to delete the DB instance and parameter group (y/n)? ",
q.is_yesno,
):
print(f"Deleting DB instance {db_inst['DBInstanceIdentifier']}.")
self.instance_wrapper.delete_db_instance(db_inst["DBInstanceIdentifier"])
print(
"Waiting for the DB instance to delete. This typically takes several minutes."
)
while db_inst is not None:
wait(10)
db_inst = self.instance_wrapper.get_db_instance(
db_inst["DBInstanceIdentifier"]
)
print(f"Deleting parameter group {parameter_group_name}.")
self.instance_wrapper.delete_parameter_group(parameter_group_name)
def run_scenario(self, db_engine, parameter_group_name, instance_name, db_name):
logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(message)s")
print("-" * 88)
print(
"Welcome to the Amazon Relational Database Service (Amazon RDS)\n"
"get started with DB instances demo."
)
print("-" * 88)
parameter_group = self.create_parameter_group(parameter_group_name, db_engine)
self.update_parameters(parameter_group_name)
db_inst = self.create_instance(
instance_name, db_name, db_engine, parameter_group
)
self.display_connection(db_inst)
self.create_snapshot(instance_name)
self.cleanup(db_inst, parameter_group_name)
print("\nThanks for watching!")
print("-" * 88)
if __name__ == "__main__":
try:
scenario = RdsInstanceScenario(InstanceWrapper.from_client())
scenario.run_scenario(
"mysql",
"doc-example-parameter-group",
"doc-example-instance",
"docexampledb",
)
except Exception:
logging.exception("Something went wrong with the demo.")
```
Definisci le funzioni richiamate dallo scenario per gestire le operazioni di Amazon RDS.
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def get_parameter_group(self, parameter_group_name):
"""
Gets a DB parameter group.
:param parameter_group_name: The name of the parameter group to retrieve.
:return: The parameter group.
"""
try:
response = self.rds_client.describe_db_parameter_groups(
DBParameterGroupName=parameter_group_name
)
parameter_group = response["DBParameterGroups"][0]
except ClientError as err:
if err.response["Error"]["Code"] == "DBParameterGroupNotFound":
logger.info("Parameter group %s does not exist.", parameter_group_name)
else:
logger.error(
"Couldn't get parameter group %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return parameter_group
def create_parameter_group(
self, parameter_group_name, parameter_group_family, description
):
"""
Creates a DB parameter group that is based on the specified parameter group
family.
:param parameter_group_name: The name of the newly created parameter group.
:param parameter_group_family: The family that is used as the basis of the new
parameter group.
:param description: A description given to the parameter group.
:return: Data about the newly created parameter group.
"""
try:
response = self.rds_client.create_db_parameter_group(
DBParameterGroupName=parameter_group_name,
DBParameterGroupFamily=parameter_group_family,
Description=description,
)
except ClientError as err:
logger.error(
"Couldn't create parameter group %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return response
def delete_parameter_group(self, parameter_group_name):
"""
Deletes a DB parameter group.
:param parameter_group_name: The name of the parameter group to delete.
:return: Data about the parameter group.
"""
try:
self.rds_client.delete_db_parameter_group(
DBParameterGroupName=parameter_group_name
)
except ClientError as err:
logger.error(
"Couldn't delete parameter group %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
def get_parameters(self, parameter_group_name, name_prefix="", source=None):
"""
Gets the parameters that are contained in a DB parameter group.
:param parameter_group_name: The name of the parameter group to query.
:param name_prefix: When specified, the retrieved list of parameters is filtered
to contain only parameters that start with this prefix.
:param source: When specified, only parameters from this source are retrieved.
For example, a source of 'user' retrieves only parameters that
were set by a user.
:return: The list of requested parameters.
"""
try:
kwargs = {"DBParameterGroupName": parameter_group_name}
if source is not None:
kwargs["Source"] = source
parameters = []
paginator = self.rds_client.get_paginator("describe_db_parameters")
for page in paginator.paginate(**kwargs):
parameters += [
p
for p in page["Parameters"]
if p["ParameterName"].startswith(name_prefix)
]
except ClientError as err:
logger.error(
"Couldn't get parameters for %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return parameters
def update_parameters(self, parameter_group_name, update_parameters):
"""
Updates parameters in a custom DB parameter group.
:param parameter_group_name: The name of the parameter group to update.
:param update_parameters: The parameters to update in the group.
:return: Data about the modified parameter group.
"""
try:
response = self.rds_client.modify_db_parameter_group(
DBParameterGroupName=parameter_group_name, Parameters=update_parameters
)
except ClientError as err:
logger.error(
"Couldn't update parameters in %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return response
def create_snapshot(self, snapshot_id, instance_id):
"""
Creates a snapshot of a DB instance.
:param snapshot_id: The ID to give the created snapshot.
:param instance_id: The ID of the DB instance to snapshot.
:return: Data about the newly created snapshot.
"""
try:
response = self.rds_client.create_db_snapshot(
DBSnapshotIdentifier=snapshot_id, DBInstanceIdentifier=instance_id
)
snapshot = response["DBSnapshot"]
except ClientError as err:
logger.error(
"Couldn't create snapshot of %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return snapshot
def get_snapshot(self, snapshot_id):
"""
Gets a DB instance snapshot.
:param snapshot_id: The ID of the snapshot to retrieve.
:return: The retrieved snapshot.
"""
try:
response = self.rds_client.describe_db_snapshots(
DBSnapshotIdentifier=snapshot_id
)
snapshot = response["DBSnapshots"][0]
except ClientError as err:
logger.error(
"Couldn't get snapshot %s. Here's why: %s: %s",
snapshot_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return snapshot
def get_engine_versions(self, engine, parameter_group_family=None):
"""
Gets database engine versions that are available for the specified engine
and parameter group family.
:param engine: The database engine to look up.
:param parameter_group_family: When specified, restricts the returned list of
engine versions to those that are compatible with
this parameter group family.
:return: The list of database engine versions.
"""
try:
kwargs = {"Engine": engine}
if parameter_group_family is not None:
kwargs["DBParameterGroupFamily"] = parameter_group_family
response = self.rds_client.describe_db_engine_versions(**kwargs)
versions = response["DBEngineVersions"]
except ClientError as err:
logger.error(
"Couldn't get engine versions for %s. Here's why: %s: %s",
engine,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return versions
def get_orderable_instances(self, db_engine, db_engine_version):
"""
Gets DB instance options that can be used to create DB instances that are
compatible with a set of specifications.
:param db_engine: The database engine that must be supported by the DB instance.
:param db_engine_version: The engine version that must be supported by the DB instance.
:return: The list of DB instance options that can be used to create a compatible DB instance.
"""
try:
inst_opts = []
paginator = self.rds_client.get_paginator(
"describe_orderable_db_instance_options"
)
for page in paginator.paginate(
Engine=db_engine, EngineVersion=db_engine_version
):
inst_opts += page["OrderableDBInstanceOptions"]
except ClientError as err:
logger.error(
"Couldn't get orderable DB instances. Here's why: %s: %s",
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return inst_opts
def get_db_instance(self, instance_id):
"""
Gets data about a DB instance.
:param instance_id: The ID of the DB instance to retrieve.
:return: The retrieved DB instance.
"""
try:
response = self.rds_client.describe_db_instances(
DBInstanceIdentifier=instance_id
)
db_inst = response["DBInstances"][0]
except ClientError as err:
if err.response["Error"]["Code"] == "DBInstanceNotFound":
logger.info("Instance %s does not exist.", instance_id)
else:
logger.error(
"Couldn't get DB instance %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return db_inst
def create_db_instance(
self,
db_name,
instance_id,
parameter_group_name,
db_engine,
db_engine_version,
instance_class,
storage_type,
allocated_storage,
admin_name,
admin_password,
):
"""
Creates a DB instance.
:param db_name: The name of the database that is created in the DB instance.
:param instance_id: The ID to give the newly created DB instance.
:param parameter_group_name: A parameter group to associate with the DB instance.
:param db_engine: The database engine of a database to create in the DB instance.
:param db_engine_version: The engine version for the created database.
:param instance_class: The DB instance class for the newly created DB instance.
:param storage_type: The storage type of the DB instance.
:param allocated_storage: The amount of storage allocated on the DB instance, in GiBs.
:param admin_name: The name of the admin user for the created database.
:param admin_password: The admin password for the created database.
:return: Data about the newly created DB instance.
"""
try:
response = self.rds_client.create_db_instance(
DBName=db_name,
DBInstanceIdentifier=instance_id,
DBParameterGroupName=parameter_group_name,
Engine=db_engine,
EngineVersion=db_engine_version,
DBInstanceClass=instance_class,
StorageType=storage_type,
AllocatedStorage=allocated_storage,
MasterUsername=admin_name,
MasterUserPassword=admin_password,
)
db_inst = response["DBInstance"]
except ClientError as err:
logger.error(
"Couldn't create DB instance %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return db_inst
def delete_db_instance(self, instance_id):
"""
Deletes a DB instance.
:param instance_id: The ID of the DB instance to delete.
:return: Data about the deleted DB instance.
"""
try:
response = self.rds_client.delete_db_instance(
DBInstanceIdentifier=instance_id,
SkipFinalSnapshot=True,
DeleteAutomatedBackups=True,
)
db_inst = response["DBInstance"]
except ClientError as err:
logger.error(
"Couldn't delete DB instance %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return db_inst
```
+ Per informazioni dettagliate sull’API, consulta i seguenti argomenti nella *documentazione di riferimento dell’API AWS SDK per Python (Boto3)*.
+ [CreaDBInstance](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/CreateDBInstance)
+ [Crea DBParameter gruppo](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/CreateDBParameterGroup)
+ [CreaDBSnapshot](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/CreateDBSnapshot)
+ [EliminaDBInstance](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DeleteDBInstance)
+ [Elimina DBParameter gruppo](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DeleteDBParameterGroup)
+ [Descrivi DBEngine versioni](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBEngineVersions)
+ [Descriva DBInstances](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBInstances)
+ [DBParameterDescrivi gruppi](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBParameterGroups)
+ [Descriva DBParameters](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBParameters)
+ [Descriva DBSnapshots](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBSnapshots)
+ [DescribeOrderableDBInstanceOpzioni](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeOrderableDBInstanceOptions)
+ [Modifica DBParameter gruppo](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/ModifyDBParameterGroup)
## Azioni
### `CreateDBInstance`
Il seguente esempio di codice mostra come utilizzare`CreateDBInstance`.
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def create_db_instance(
self,
db_name,
instance_id,
parameter_group_name,
db_engine,
db_engine_version,
instance_class,
storage_type,
allocated_storage,
admin_name,
admin_password,
):
"""
Creates a DB instance.
:param db_name: The name of the database that is created in the DB instance.
:param instance_id: The ID to give the newly created DB instance.
:param parameter_group_name: A parameter group to associate with the DB instance.
:param db_engine: The database engine of a database to create in the DB instance.
:param db_engine_version: The engine version for the created database.
:param instance_class: The DB instance class for the newly created DB instance.
:param storage_type: The storage type of the DB instance.
:param allocated_storage: The amount of storage allocated on the DB instance, in GiBs.
:param admin_name: The name of the admin user for the created database.
:param admin_password: The admin password for the created database.
:return: Data about the newly created DB instance.
"""
try:
response = self.rds_client.create_db_instance(
DBName=db_name,
DBInstanceIdentifier=instance_id,
DBParameterGroupName=parameter_group_name,
Engine=db_engine,
EngineVersion=db_engine_version,
DBInstanceClass=instance_class,
StorageType=storage_type,
AllocatedStorage=allocated_storage,
MasterUsername=admin_name,
MasterUserPassword=admin_password,
)
db_inst = response["DBInstance"]
except ClientError as err:
logger.error(
"Couldn't create DB instance %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return db_inst
```
+ Per i dettagli sull'API, consulta [Create DBInstance](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/CreateDBInstance) in *AWS SDK for Python (Boto3) API Reference*.
### `CreateDBParameterGroup`
Il seguente esempio di codice mostra come utilizzare. `CreateDBParameterGroup`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def create_parameter_group(
self, parameter_group_name, parameter_group_family, description
):
"""
Creates a DB parameter group that is based on the specified parameter group
family.
:param parameter_group_name: The name of the newly created parameter group.
:param parameter_group_family: The family that is used as the basis of the new
parameter group.
:param description: A description given to the parameter group.
:return: Data about the newly created parameter group.
"""
try:
response = self.rds_client.create_db_parameter_group(
DBParameterGroupName=parameter_group_name,
DBParameterGroupFamily=parameter_group_family,
Description=description,
)
except ClientError as err:
logger.error(
"Couldn't create parameter group %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return response
```
+ Per i dettagli sull'API, consulta [Create DBParameter Group](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/CreateDBParameterGroup) in *AWS SDK for Python (Boto3) API Reference*.
### `CreateDBSnapshot`
Il seguente esempio di codice mostra come utilizzare. `CreateDBSnapshot`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def create_snapshot(self, snapshot_id, instance_id):
"""
Creates a snapshot of a DB instance.
:param snapshot_id: The ID to give the created snapshot.
:param instance_id: The ID of the DB instance to snapshot.
:return: Data about the newly created snapshot.
"""
try:
response = self.rds_client.create_db_snapshot(
DBSnapshotIdentifier=snapshot_id, DBInstanceIdentifier=instance_id
)
snapshot = response["DBSnapshot"]
except ClientError as err:
logger.error(
"Couldn't create snapshot of %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return snapshot
```
+ Per i dettagli sull'API, consulta [Create DBSnapshot](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/CreateDBSnapshot) in *AWS SDK for Python (Boto3) API Reference*.
### `DeleteDBInstance`
Il seguente esempio di codice mostra come utilizzare. `DeleteDBInstance`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def delete_db_instance(self, instance_id):
"""
Deletes a DB instance.
:param instance_id: The ID of the DB instance to delete.
:return: Data about the deleted DB instance.
"""
try:
response = self.rds_client.delete_db_instance(
DBInstanceIdentifier=instance_id,
SkipFinalSnapshot=True,
DeleteAutomatedBackups=True,
)
db_inst = response["DBInstance"]
except ClientError as err:
logger.error(
"Couldn't delete DB instance %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return db_inst
```
+ Per i dettagli sull'API, consulta [Delete DBInstance](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DeleteDBInstance) in *AWS SDK for Python (Boto3) API Reference*.
### `DeleteDBParameterGroup`
Il seguente esempio di codice mostra come utilizzare. `DeleteDBParameterGroup`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def delete_parameter_group(self, parameter_group_name):
"""
Deletes a DB parameter group.
:param parameter_group_name: The name of the parameter group to delete.
:return: Data about the parameter group.
"""
try:
self.rds_client.delete_db_parameter_group(
DBParameterGroupName=parameter_group_name
)
except ClientError as err:
logger.error(
"Couldn't delete parameter group %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
```
+ Per i dettagli sull'API, consulta [Delete DBParameter Group](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DeleteDBParameterGroup) in *AWS SDK for Python (Boto3) API Reference*.
### `DescribeDBEngineVersions`
Il seguente esempio di codice mostra come utilizzare. `DescribeDBEngineVersions`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def get_engine_versions(self, engine, parameter_group_family=None):
"""
Gets database engine versions that are available for the specified engine
and parameter group family.
:param engine: The database engine to look up.
:param parameter_group_family: When specified, restricts the returned list of
engine versions to those that are compatible with
this parameter group family.
:return: The list of database engine versions.
"""
try:
kwargs = {"Engine": engine}
if parameter_group_family is not None:
kwargs["DBParameterGroupFamily"] = parameter_group_family
response = self.rds_client.describe_db_engine_versions(**kwargs)
versions = response["DBEngineVersions"]
except ClientError as err:
logger.error(
"Couldn't get engine versions for %s. Here's why: %s: %s",
engine,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return versions
```
+ Per i dettagli sull'API, consulta [Descrivi DBEngine le versioni](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBEngineVersions) in *AWS SDK for Python (Boto3) API Reference*.
### `DescribeDBInstances`
Il seguente esempio di codice mostra come utilizzare. `DescribeDBInstances`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def get_db_instance(self, instance_id):
"""
Gets data about a DB instance.
:param instance_id: The ID of the DB instance to retrieve.
:return: The retrieved DB instance.
"""
try:
response = self.rds_client.describe_db_instances(
DBInstanceIdentifier=instance_id
)
db_inst = response["DBInstances"][0]
except ClientError as err:
if err.response["Error"]["Code"] == "DBInstanceNotFound":
logger.info("Instance %s does not exist.", instance_id)
else:
logger.error(
"Couldn't get DB instance %s. Here's why: %s: %s",
instance_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return db_inst
```
+ Per i dettagli sull'API, consulta [Descrivi DBInstances](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBInstances) in *AWS SDK for Python (Boto3) API Reference*.
### `DescribeDBParameterGroups`
Il seguente esempio di codice mostra come utilizzare. `DescribeDBParameterGroups`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def get_parameter_group(self, parameter_group_name):
"""
Gets a DB parameter group.
:param parameter_group_name: The name of the parameter group to retrieve.
:return: The parameter group.
"""
try:
response = self.rds_client.describe_db_parameter_groups(
DBParameterGroupName=parameter_group_name
)
parameter_group = response["DBParameterGroups"][0]
except ClientError as err:
if err.response["Error"]["Code"] == "DBParameterGroupNotFound":
logger.info("Parameter group %s does not exist.", parameter_group_name)
else:
logger.error(
"Couldn't get parameter group %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return parameter_group
```
+ Per i dettagli sull'API, consulta [DBParameterDescrivi i gruppi](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBParameterGroups) in *AWS SDK for Python (Boto3) API Reference*.
### `DescribeDBParameters`
Il seguente esempio di codice mostra come utilizzare. `DescribeDBParameters`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def get_parameters(self, parameter_group_name, name_prefix="", source=None):
"""
Gets the parameters that are contained in a DB parameter group.
:param parameter_group_name: The name of the parameter group to query.
:param name_prefix: When specified, the retrieved list of parameters is filtered
to contain only parameters that start with this prefix.
:param source: When specified, only parameters from this source are retrieved.
For example, a source of 'user' retrieves only parameters that
were set by a user.
:return: The list of requested parameters.
"""
try:
kwargs = {"DBParameterGroupName": parameter_group_name}
if source is not None:
kwargs["Source"] = source
parameters = []
paginator = self.rds_client.get_paginator("describe_db_parameters")
for page in paginator.paginate(**kwargs):
parameters += [
p
for p in page["Parameters"]
if p["ParameterName"].startswith(name_prefix)
]
except ClientError as err:
logger.error(
"Couldn't get parameters for %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return parameters
```
+ Per i dettagli sull'API, consulta [Descrivi DBParameters](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBParameters) in *AWS SDK for Python (Boto3) API Reference*.
### `DescribeDBSnapshots`
Il seguente esempio di codice mostra come utilizzare. `DescribeDBSnapshots`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def get_snapshot(self, snapshot_id):
"""
Gets a DB instance snapshot.
:param snapshot_id: The ID of the snapshot to retrieve.
:return: The retrieved snapshot.
"""
try:
response = self.rds_client.describe_db_snapshots(
DBSnapshotIdentifier=snapshot_id
)
snapshot = response["DBSnapshots"][0]
except ClientError as err:
logger.error(
"Couldn't get snapshot %s. Here's why: %s: %s",
snapshot_id,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return snapshot
```
+ Per i dettagli sull'API, consulta [Descrivi DBSnapshots](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeDBSnapshots) in *AWS SDK for Python (Boto3) API Reference*.
### `DescribeOrderableDBInstanceOptions`
Il seguente esempio di codice mostra come utilizzare. `DescribeOrderableDBInstanceOptions`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def get_orderable_instances(self, db_engine, db_engine_version):
"""
Gets DB instance options that can be used to create DB instances that are
compatible with a set of specifications.
:param db_engine: The database engine that must be supported by the DB instance.
:param db_engine_version: The engine version that must be supported by the DB instance.
:return: The list of DB instance options that can be used to create a compatible DB instance.
"""
try:
inst_opts = []
paginator = self.rds_client.get_paginator(
"describe_orderable_db_instance_options"
)
for page in paginator.paginate(
Engine=db_engine, EngineVersion=db_engine_version
):
inst_opts += page["OrderableDBInstanceOptions"]
except ClientError as err:
logger.error(
"Couldn't get orderable DB instances. Here's why: %s: %s",
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return inst_opts
```
+ Per i dettagli sull'API, consulta [DescribeOrderableDBInstanceOptions](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/DescribeOrderableDBInstanceOptions) in *AWS SDK for Python (Boto3) API Reference*.
### `ModifyDBParameterGroup`
Il seguente esempio di codice mostra come utilizzare. `ModifyDBParameterGroup`
**SDK per Python (Boto3)**
C'è altro da fare GitHub. Trova l'esempio completo e scopri di più sulla configurazione e l'esecuzione nel [Repository di esempi di codice AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/rds#code-examples).
```
class InstanceWrapper:
"""Encapsulates Amazon RDS DB instance actions."""
def __init__(self, rds_client):
"""
:param rds_client: A Boto3 Amazon RDS client.
"""
self.rds_client = rds_client
@classmethod
def from_client(cls):
"""
Instantiates this class from a Boto3 client.
"""
rds_client = boto3.client("rds")
return cls(rds_client)
def update_parameters(self, parameter_group_name, update_parameters):
"""
Updates parameters in a custom DB parameter group.
:param parameter_group_name: The name of the parameter group to update.
:param update_parameters: The parameters to update in the group.
:return: Data about the modified parameter group.
"""
try:
response = self.rds_client.modify_db_parameter_group(
DBParameterGroupName=parameter_group_name, Parameters=update_parameters
)
except ClientError as err:
logger.error(
"Couldn't update parameters in %s. Here's why: %s: %s",
parameter_group_name,
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
else:
return response
```
+ Per i dettagli sull'API, consulta [Modify DBParameter Group](https://docs.aws.amazon.com/goto/boto3/rds-2014-10-31/ModifyDBParameterGroup) in *AWS SDK for Python (Boto3) API Reference*.
## Scenari
### Creazione di un tracciatore di elementi di lavoro di Aurora Serverless
L’esempio di codice seguente mostra come creare un’applicazione web che traccia gli elementi di lavoro in database Amazon Aurora serverless e utilizza Amazon Simple Email Service (Amazon SES) per inviare report.
**SDK per Python (Boto3)**
Mostra come utilizzare per AWS SDK per Python (Boto3) creare un servizio REST che tenga traccia degli elementi di lavoro in un database Amazon Aurora Serverless e invii report tramite e-mail utilizzando Amazon Simple Email Service (Amazon SES). Questo esempio utilizza il framework Web Flask per gestire il routing HTTP e si integra con una pagina web React per presentare un’applicazione web completamente funzionale.
+ Crea un servizio Flask REST che si integri con. Servizi AWS
+ Lettura, scrittura e aggiornamento degli elementi di lavoro archiviati in un database Aurora Serverless.
+ Crea un Gestione dei segreti AWS segreto che contenga le credenziali del database e usalo per autenticare le chiamate al database.
+ Utilizzo di Amazon SES per inviare report via e-mail sugli elementi di lavoro.
Per il codice sorgente completo e le istruzioni su come configurarlo ed eseguirlo, guarda l'esempio completo su. [GitHub](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/cross_service/aurora_item_tracker)
**Servizi utilizzati in questo esempio**
+ Aurora
+ Amazon RDS
+ Servizi di dati di Amazon RDS
+ Amazon SES
## Esempi serverless
### Connessione a un database Amazon RDS in una funzione Lambda
L’esempio di codice seguente mostra come implementare una funzione Lambda che si connette a un database RDS. La funzione effettua una semplice richiesta al database e restituisce il risultato.
**SDK per Python (Boto3)**
C'è altro su GitHub. Trova l’esempio completo e scopri come eseguire la configurazione e l’esecuzione nel repository di [Esempi serverless](https://github.com/aws-samples/serverless-snippets/tree/main/lambda-function-connect-rds-iam).
Connessione a un database Amazon RDS in una funzione Lambda tramite Python.
```
import json
import os
import boto3
import pymysql
# RDS settings
proxy_host_name = os.environ['PROXY_HOST_NAME']
port = int(os.environ['PORT'])
db_name = os.environ['DB_NAME']
db_user_name = os.environ['DB_USER_NAME']
aws_region = os.environ['AWS_REGION']
# Fetch RDS Auth Token
def get_auth_token():
client = boto3.client('rds')
token = client.generate_db_auth_token(
DBHostname=proxy_host_name,
Port=port
DBUsername=db_user_name
Region=aws_region
)
return token
def lambda_handler(event, context):
token = get_auth_token()
try:
connection = pymysql.connect(
host=proxy_host_name,
user=db_user_name,
password=token,
db=db_name,
port=port,
ssl={'ca': 'Amazon RDS'} # Ensure you have the CA bundle for SSL connection
)
with connection.cursor() as cursor:
cursor.execute('SELECT %s + %s AS sum', (3, 2))
result = cursor.fetchone()
return result
except Exception as e:
return (f"Error: {str(e)}") # Return an error message if an exception occurs
```